I hardly ever spot between cycles. I have 4-5 week cycles. Last night I felt a painful bloating feeling, only lasting about a min. I woke up today and was spotting, like a light brownish red color, but it was enough for me to have to change underwear (sorry tmi) and wear a tampon, but there wasnt much more blood on it and Ive stopped bleeding. Is there any reason why I would be spotting that much? I'm on CD16, dont use opk, my SO left 4 days ago for training for 6 weeks so were taking vitamins and trying to just get healthy but no point for me to use opks since hes gone haha. Has anyone ever had this? Could it be ovulation bleeding? Other info I read talks about bright red or pink bleeding, and this was more brownish. TiA.